Dual dimmer switch



FIG. 1 is a perspective view of a dual dimmer switch according to an embodiment of our new design.

FIG. 2 is a front view thereof.

FIG. 3 is a left side view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The rear view forms no part of the design and is omitted. The portions of the drawings appearing in broken line are for environment only and do not form a part of the design. 

We claim the ornamental design for a dual dimmer switch, as shown and described. 